I haven't been able to find a straight answer in previous threads, so I thought I might ask for clarity.
It seems my Xperia SP has Bootloader Unlock Allowed set to No. The FAQs seem to suggest that this might be due to a SIM lock. My provider (Fido) offers SIM unlock that is covered under warranty for $50. Before I bite the bullet and pay for it, can anyone tell me if this will actually make a difference and allow me to unlock the bootloader?